Characters with this skill are familiar with the practices and uses of map-making. They can read maps, even if they are drawn in an unconventional or archaic manner or depict unknown areas. They are also able to recognize coastlines and other geographic features, even when distorted, badly-drawn, or presented in a disguised fashion. Using a map, cartographers can guide themselves or others toward a certain goal or in a specific direction.
Cartographers are also very good at remembering directions and features. This is very useful in dungeons and may enable a character to remember a way out or recall where a passage leads. Tests are made against Int to determine success.